More port area.

[playmysong 2]

I was wondering how much of an audible difference more port area would make. For instance my 12 is in a 2 cu. ft box with 2X13 port area which is 26 sq. inches of port. Would a 3x13 port make it that much louder or is more port area just desirable for chasing tenths on the tl. More port means a bigger box but is it worth it? I know higher tuning will definitely make it louder but i don't compete so i would never tune above 35 hz. Or perhaps i need a bigger sub . I'm more of a basshead than i thought.

[shizzzon 461]

if i could with my current install, i like tuning just under 40hz and set the subsonic down in the low to mid 20s. Make sure you use a sub that has LONG throw so it can be set like that, otherwise, that sub will get damaged quick.

to answer your question, no, you shouldnt hear a difference because the new port area is no where near a major change.

You would, like u said, tell a difference by tuning higher before u would increasing port area just 13sqin larger.

Now, if u increased port area from 26sqin to lets say 60-80sqin... well, that might be louder to the ear... but too hard to speculate.

[playmysong 2]

Thanks for the reply. I don't think i would want that much port area for a 12 for my tuning habits because that's a big box. Is 24 mm xmax enough throw for your tuning suggestion? I have the Soundsplinter rlp-12.

[shizzzon 461]

i'm sure it is, that's practically 2" p2p linear excursion. You should be able to tune to around 35-37hz and still drop low. Of course the lower you tune, the lower and louder it will sound though.

Preferrably though, lots of people like 35hz unless you are a low-end-fiend, then 30-32hz is suggested.

[playmysong 2]

Cool. My box is already tuned to 32 hz and i was thinking of tuning just a little higher. Most music doesn't go that low but when it does, man is it fun.

[RE XXXv3 31]

1.35 cu ft net volume sealed

1.5 cu ft net volume vented, Fb = 34 Hz

1.85 cu ft net volume vented, Fb = 28 Hz

Qts: 0.207 Qts: 0.219 Mounting Depth: 17.5 cm

Qes: 0.226 Qes: 0.242 Total Depth: 18.5 cm

Qms: 2.470 Qms: 2.266 Outside Diameter: 31.8 cm

Fs: 23.43 Hz Fs: 18.856 Hz Weight: 35 lbs

Re: 3.7 Ohm Re: 6.26 Ohm Magnet Width: 18.8 cm

Ls: 4.060 mH Ls: 7.382 mH Mounting Cutout: 28 cm

Rp: 7.478 Rp: 14.68 Displacement: 0.15 cu ft

Vas: 87.73 L Vas: 142.7 L

Mms: 177.9 g Mms: 168.8 g

Cms: 259.2 u Cms: 421.9 u

Bl: 20.70 T*m Bl: 22.74 T*m

SPL: 88.81 dB SPL: 87.79 dB

Sd: 0.0471 m^2 Sd: 0.0471 m^2

Xmax: 24.2 mm Xmax: 24.2 mm

Tune to 30hz .

[playmysong 2]

1.35 cu ft net volume sealed

1.5 cu ft net volume vented, Fb = 34 Hz

1.85 cu ft net volume vented, Fb = 28 Hz

Qts: 0.207 Qts: 0.219 Mounting Depth: 17.5 cm

Qes: 0.226 Qes: 0.242 Total Depth: 18.5 cm

Qms: 2.470 Qms: 2.266 Outside Diameter: 31.8 cm

Fs: 23.43 Hz Fs: 18.856 Hz Weight: 35 lbs

Re: 3.7 Ohm Re: 6.26 Ohm Magnet Width: 18.8 cm

Ls: 4.060 mH Ls: 7.382 mH Mounting Cutout: 28 cm

Rp: 7.478 Rp: 14.68 Displacement: 0.15 cu ft

Vas: 87.73 L Vas: 142.7 L

Mms: 177.9 g Mms: 168.8 g

Cms: 259.2 u Cms: 421.9 u

Bl: 20.70 T*m Bl: 22.74 T*m

SPL: 88.81 dB SPL: 87.79 dB

Sd: 0.0471 m^2 Sd: 0.0471 m^2

Xmax: 24.2 mm Xmax: 24.2 mm

Tune to 30hz .

Is that because the fb is so low?